I just got a Mac (it's a Powerbook G4, brand-new, hand-me-down from my uncle), and it had an older version of MSN messenger installed on it. I tried signing in, but it told me I had to update my messenger in order to continue. I did, but a new window appeared with the MSN icon and an arrow pointing to the Applications folder. I dragged the icon towards the application folder, and then tried opening the messenger, but it didn't work. I even dragged it into my Dock, and when I click it, it doesn't open. Can anybody help me? Thanks.